Yeah, and if your BIOS update still shows TPM 1.2, you might be out of luck for an official upgrade, as that's a hardware limitation on some older boards.
Yeah, I had the same problem on an older laptop. It turned out the TPM chip was physically a 1.2 version, so no amount of BIOS tweaking could fix it. Good luck!
Can confirm. You could also check if there's a BIOS update for your specific motherboard model, as that sometimes enables TPM 2.0 support. Another option is to look into a registry edit workaround, but that's not officially supported and might have downsides.